Richard martin



n sfrarns nar eric.

RICHARD MARTIN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO IIIMSELF ANDALEX I PRIES'ILY, OF SAME PLAGE.

MACHINE FOR DAIVIPING- PAPER.

Toall whom it may concern:

Be it known that Is RICHARD MARTIN, of the city of Philadelphia andState of Pennsylvania, have invented a new and Improved Apparatus forDamping Paper; and I do hereby declare the following to be a full,clear, and exact description of the saine, reference being had to theaccompanying drawing and to the letters of reference marked thereon.

My invention consists of a revolving roller having a series oflongitudinal flutes or grooves, in combination with two plain rollers,and a trough for containing water, the whole being arranged andoperating substantially as set forth hereafter for the purpose ofimparting to paper that uniform dampness necessary when the paper has tobe glazed, used for ordinary printing, or for converting into wallpaper.

In order to enable others to make and use my invention I will nowproceed to describe its construction and operation.

On referencev to the accompanying drawing which forms a part of thisspecification,

Figure l is a vertical transverse section of my improved machine fordamping paper, and Fig. 2 a ground plan.

A and A are the opposite side frames of the machine and are connectedtogether by the trough B.

C, D and G\ are th ee rollers of brass or other suitable ymateria thejournals of the roller C turning in suitable brackets a a one of whichis secured toeach frame1 the journals of the roller D turning insuitable boxes attached to the same frame, and the journals of theroller G turning in boXes c c secured to the projecting portions b b ofthe frames in such a manner as to be readily adjusted vertically.

In the surface of the roller D are cut a series of utes or grooves so asto form a series of longitudinal projections m m the roller being sosituated in respect to the trough that it shall dip to the extent of onequarter (or thereabout) of its circumference into a body of water whichis maintained at a comparatively uniform level in the said trough.

The paper passes from the paper machine or from a roller around which ithas been wound in the direction shown by the red line Fig. l and pointedout by the arrow, under the roller G- over theroller Dl and over theroller C. A rotary motion is imparted to the roller D in the directiontaken -by the pape-r and pointed out by the arrow.

The speed of. the .circumference of this roller should be equal to, orsomewhat greater than, the speed of the paper. As the {iuted rollerrevolves each groove or flute takes up a body of water a portion ofwhich remains lodged in the grooves as the latter are turned to aposition directly under the paper. This body of water in every flute orgroove maintains that uniform supply of water on the ribs between thegrooves which would not be preserved on simple revolving ribs betweenwhich there existed no groove for the lodgment of water. As the paper isdrawn forward in contact with the revolving roller D deposits of waterin the form of transverse ribs or stripes, situated at equal distancesapart, will adhere to the under surface of the paper, and, as`

the paper passes over the roller C, the latter will cause the severaltransverse deposits of water to merge into each other so that by' thetime the paper has passed this roller C, its under surface will have anuniform dampness imparted to it, a dampness gradually absorbed by thepaper as it continues its progress.

As all paper has to be damped before being glazed by the calender it isimportant that the moisture should be distributed equally throughout thesurface of the paper. The usual process has been to cut the paper intosheets then to damp the latter by passing them through water, and thento pass the sheets separately between the rollers of the calender, aprocess which involves the necessity of much tedious manipulation. Amore recent process has been that of submitting a continuous traversingsheet to the action of jets of steam which have the injurious effect ofrusting the machinery. Both of these evils are avoidedby my abovedescribed apparatus which may be applied with good effect to the dampingof continuous sheets used in printing, or in the manufacture of wallpaper. The apparatus may also be applied to the damping of separatesheets of paper ready for printers use! the circumference of the rollertraverses at in which case endless tapes or bands may be readily appliedto the rollers for the purpose of conveying the sheets through thcmachine.

More or less dampness may be imparted to the paper by the adjustment ofthe roller Gr, for should the boxes e e of that roller be lowered therewill be more lap of the paper over the iuted roller and consequentlymore of the ribs of the latter in contact with the paper than when theroller Gr is raised. An increased dampness may also be imparted to thepaper by causing the circumference of the roller D to revolve fasterthan the paper moves, in which case the transverse deposits of water onthe paper will be of greater width than when the same speed as thepaper.

I claim as my invention and desire to secure by Letters Patent- Therevolving roller D having a series of longitudinal Aribs w withintervening flutes or grooves, in combination with a trough B and therollers G and C the whole being arranged substantially as set forth andapplied to the damping of paper as specified.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

RICHARD MARTIN.

Vitnesses HENRY I-IowsoN, JOHN WHITE.

